Thanks for the suggestions everyone.

I'll be replacing the wiper blades... when they need to be changed, probably with something from Autobarn.

I'll admit I'm becoming a bit paranoid about getting ripped off. I once had a garage bill me for new wiper blades at a routine service. It was awkward when I pointed out to the mechanic that I'd changed them myself the week before, and they were the same ones still on the car.